character: Mr. Johnson
topic: Recycling Metals and Environmental Impact
grade: 9
subject: Chemistry
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character: Ms. Smith
topic: The Chemistry of Metals in the Environment
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Sustainable Practices in Metal Recycling
grade: 9
subject: Chemistry
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character: Mrs. Brown
topic: The Effect of Metal Waste on Ecosystems
grade: 9
subject: Chemistry
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